If you’re anything like me, you pretty much spend all of your day clicking. Clicking a mouse. Clicking a trackpad. Clicking a keyboard. And yet, despite all of that physical exertion, I’m still somehow a fatass. How can that be? Luckily, some scientists have looked into the problem, and figured out the answer: I’m just not clicking enough.

Out of the box, the iHealth HS3 Wireless Bluetooth Scale ($70) is somewhat impressive. With its digital (albeit not backlit) display and snazzy looking-glass top, this is a scale that will at least look spiffy in your bathroom when company is over. Even in the box, the scale makes a good case for gadget adoption: It promises to keep track of your weight, calories and exercise easily using only the scale itself and an accompanying app that can be used on your iPhone or iPad. Technically, the iHealth Scale does do that, but there are a few kinks that make this product’s promises fall flat.

Despite all our 21st-century technical wizardry, one of the easiest and least expensive ways to get a very basic idea of physical health is through a metric that’s been used for a very long time: body weight.

The Withings WiFi Body Scale ($160) takes this concept to the next level in many ways, including allowing you access to all your data on a gorgeously designed iOS app. It also adds an even more important metric, body fat percentage, and goes a long way to erasing many of the pitfalls using a simple scale can lead to — and it does this all while remaining incredibly easy to use. In fact, it might be the most effective tool I’ve used to keep healthy.